Merge branch 'master' into 3.3.x

* master: (295 commits)
  TS-2081 Make the WCCP addr configuration LOCAL
  TS-2093: Check bounds on plugin stat creation.
  TS-2092 Use of uninitialized member in HdrHeap.
  [TS-2052] ET_SSL thread spinning
  TS-2090 Make proxy.config.allocator.enable_reclaim default based on build instructions
  TS-1006: adjust some reclaimable-freelist's default configuration
  Updated newish tests to the gitignore
  Fix autoconf checks for mcheck_pedantic()
  Fix configure check for eventfd
  TS-1330: Fix logging core at checkout_write()
  add some standard extensions to ignore list
  TS-1953: remove version check from stable plugins
  TS-1953: Remove check_ts_version() from experimental plugins
  TS-1953: remove check_ts_version() from examples
  Added TS-2086.
  TS-2086 Remove a few more unused configs
  Added TS-1685
  TS-1685 Remove TS_MICRO and fellas
  Added Ts-1255
  TS-1255 Fix the types for all overridable configs. This was actually a real bug in the code, in that all float configurations were actually treated as integer, rendering them useless
  ...